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Semi-automatic extraction of primitive geometric entities from point clouds

Goussard, Charl Leonard (2001-12)

Thesis (MScEng)--University of Stellenbosch, 2001.

Thesis

ENGLISH ABSTRACT: This thesis describes an algorithm to extract primitive geometric entities (flat planes,
spheres or cylinders, as determined by the user's inputs) from unstructured,
unsegmented point clouds. The algorithm extracts whole entities or only parts
thereof. The entity boundaries are computed automatically. Minimal user interaction
is required to extract these entities. The algorithm is accurate and robust.
The algorithm is intended for use in the reverse engineering environment. Point
clouds created in this environment typically have normal error distributions.
Comprehensive testing and results are shown as well as the algorithm's usefulness in
the reverse engineering environment.